<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<link rel="stylesheet" href="css/bootstrap.min.css">
	<script src="js/jquery-3.1.1.min.js"></script>
	<script src="js/bootstrap.min.js"></script>
	<title>Document</title>
</head>
<body>
	<div class="container">
		<div class="dropdown pull-right">
			<button class="btn btn-default dropdown-toggle " type="button" data-toggle="dropdown" >
				下拉菜单
				<span class="caret"></span>
			</button>
			<!-- <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu1">
				<li><a href="" role="menuitem">1</a></li>
				<li><a href="" role="menuitem">2</a></li>
				<li><a href="" role="menuitem">3</a></li>
				<li><a href="" role="menuitem">4</a></li>
			</ul> -->
			<ul class="dropdown-menu dropdown-menu-right" role="menu" >
				<!-- <li class="dropdown-header">数字</li> -->
				<li><a href="" >1</a></li>
				<li><a href="" >2</a></li>
				<li><a href="" >3</a></li>
				<li><a href="" >4</a></li>
				<li class="divider"></li>
				<!-- <li class="dropdown-header">zimu </li> -->
				<li  class="disabled"><a href="">a</a></li>
				<li><a href="" >b</a></li>
				<li><a href="" >c</a></li>
				<li><a href="" >d</a></li>
			</ul>
		</div>
	</div>


</body>
</html>